A Laboratory Guide in Elementary Bacteriology

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Macmillan, 1904 - Bacteriology - 395 pages
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Page 332 - ... and leaving in its place a collection of round cells. Ordinarily a considerable number of ganglion cells will be found which have undergone only a slight change, but under certain conditions the process is so widespread that all the ganglion cells are destroyed. The intensity of these changes varies in different animals; they are perhaps most pronounced in the dog, less marked in man and still less in the rabbit.
Page 336 - Liquid cultures, or cultures of micro-organisms in media that are fluid at the ordinary temperature (below 45" C., or 113 F.), are unmailable. Such specimens may be sent In media that remain solid at ordinary temperatures.
Page 332 - They are especially marked in the plexiform ganglion of the pneumogastric nerve and the gasserian ganglion. Normally, these ganglia, are composed of a supporting tissue holding in its meshes the nerve cells, each one of which is enclosed in a capsule, made up of a single layer of endothelial cells.
Page 326 - The thumb of the left hand is pressed between the spinous processes, and the point of the needle is entered about 1 cm. to the right of the median line and on a level with the thumb-nail, and directed slightly upward and inward toward the median line. At a depth of 3 or 4 cm. in children and 7 or 8 cm. in adults the needle enters the subarachnoid space, and the fluids flow out in drops or in a stream.
Page 84 - Bullate : like a blistered surface, rising in convex prominences, rather coarse. Vesicular: more or less covered with minute vesicles, due to gas formation ; more minute than bullate. Verrucose : wartlike, bearing wartlike prominences. Squamose : scaly, covered with scales. Echinate : beset with pointed prominences. Papillate : beset with nipple- or mamma-like processes. Rugose: short, irregular folds, due to shrinkage of surface growth. Corrugated : in long folds, due to shrinkage. Contoured: an...
Page 8 - Normal solutions as originally devised arc prepared so that one liter at 16' C. shall contain the hydrogen equivalent of the active reagent weighed in grams (H=l).
Page 326 - The operation and the subsequent examination of the fluid should be as carefully performed as any other bacteriological investigation, in order to obtain accurate results. The back of the patient and the operator's hands should be made sterile. The needle should be boiled for ten minutes. The patient should lie on the right side, with the knees drawn up, and with the uppermost shoulder so depressed as to present the spinal column to the operator. This position permits the operator to thrust the needle...
Page 89 - II. Cells cylindrical, longer or shorter, and only dividing in one plane, and elongating to twice the normal length before the division.
Page 270 - The desired length of the tube can be secured in all of the tubes by tipping and rolling them, thus bringing the collodion into contact with the glass to the desired height. As the tubes are coated they are placed, mouth down, in a wire basket or test-tube rack as indicated in Fig. 1. In this way the extra collodion drains off and free access of air dries and hardens the collodion, leaving a thin coat covering the inner surface of the tube. The thickness of the coat depends on the consistancy of...
Page 270 - They are then immersed in a test-tube of the medium. The sacs are held in position in the test-tube by means of the tongue formed by the collodion flowing out of the tube. This tongue is folded over the lip of the tube. (Fig. 2, C.) Before, however, the sac is put in the test-tube a piece of cotton or silk cord is placed around the sac near the top and held in position by means of a surgeon's knot, loosely drawn. The cord should be quite stout so that the sac can later be tightly closed. The ends...

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